Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
  • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
  • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
  • H04N7/0887—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of programme or channel identifying signals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H40/00—Arrangements specially adapted for receiving broadcast information
  • H04H40/09—Arrangements for receiving desired information automatically according to timetables
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
  • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
  • H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
  • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
  • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
  • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
  • H04H20/33—Arrangements for simultaneous broadcast of plural pieces of information by plural channels
  • H04H20/34—Arrangements for simultaneous broadcast of plural pieces of information by plural channels using an out-of-band subcarrier signal
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
  • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
  • H04H60/25—Arrangements for updating broadcast information or broadcast-related information
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
  • H04H60/68—Systems specially adapted for using specific information, e.g. geographical or meteorological information
  • H04H60/72—Systems specially adapted for using specific information, e.g. geographical or meteorological information using electronic programme guides [EPG]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/47—End-user applications
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/47—End-user applications
  • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/63—Generation or supply of power specially adapted for television receivers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
  • Y02D30/00—Reducing energy consumption in communication networks
  • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

• the present invention relates to a method of controlling reception in a data broadcast receiver which receives a data broadcast of which data is transmitted in a frame comprising a plurality of packets and is interleaved at a same bit position in each packet and transmitted.
• the invention also relates to a method of broadcasting data to such receivers.
• a TV data broadcast system for enabling reception of a terrestrial data broadcast is currently being examined in Japan.
• the terrestrial data broadcast system provides programs such as:
• the programs are not restricted to the above and it can be considered that the programs will be further diversified in the future.
• the data is transmitted in the form of frames.
• One such a frame is shown in Fig. 1.
• the frame consists of total 9232 bits including a 16-bit framing code or frame-sync (FC) and 32 data packets each having 288 bits.
• One data packet is made up of a 16-bit mode control (MC), a 14-bit prefix (PF), 176-bit service data (DAT) and a check code bit (CHC) for correcting errors.
• MC 16-bit mode control
• PF 14-bit prefix
• DAT 176-bit service data
• CHC check code bit
• the data of all packets in the frame are interleaved with a depth of 32 in the vertical direction as shown by the dashed arrow 20 in Fig. 1. That is, after transmitting the frame-sync signal FC, the most significant bit of the MC in the first packet is sent first, then the most significant bit of the MC of the second packet, etc.. In the same manner, the second bit in the MC of the first packet is transmitted after the most significant bit of the MC in the 32nd packet. It is therefore necessary to receive all the data of the frame to which respective packets belong in order to decode the data of each packet.
• the 16-bit MC comprises five significant information bits and eleven error correction bits.
• Fig. 2 shows the information bits bl-b5 of the MC currently defined in the TV data broadcast system, bl being the most significant bit. Five broadcast services are defined at present.
• the program broadcasting time or reception enabled time is restricted. Operation of the receiver in the time other than the program broadcast time greatly consumes power, thereby leading to disadvan- tages in the receiver for mobile reception in particular. Manually operating the receiver is a troublesome operation.
• a method for controlling reception in a data broadcast receiver which receives a data broadcast of which data is transmitted in a frame form consisting of a frame identification portion and a plurality of packets each consisting of at least a data portion and a broadcast identification portion transmitted prior to the data portion and of which data except for that of the frame identifica- tion portion is interleaved at a same bit position of each packet and transmitted, is characterized in that, under control of a control device, operations of the receiver are: detecting a frame identification portion of a frame; deinterleaving and decoding data in a broadcast identification portion when the frame synchronization has been acquired; deinterleaving and decoding program identification data and time information data of reception control information included in a data portion when the decoded broadcast identification portion data has an identifier for identifying a reception control information broadcast; entering a standby mode until the time specified from the time information data based on the decoded predetermined program identification data and the associated time information data;
• a second aspect of the invention is characterized in that the program identification data consists of program number data, service number data, broadcasting station identification data and/or broadcasting channel data, and the time information data consists of transmission time data, retransmission time data and/or intermittent transmission data.
• a third aspect of the invention is characterized in that reception control of the receiver is carried out by gradually receiving the reception control information broadcast based on the category of program.
• a fourth aspect of the invention is characterized in that if the receiver has identified the broadcast identification portion including an identifier of a time signal broadcast in a reception enabled mode, the receiver calibrates the time of an internal clock by using time information included in the data portion of the associated packet.
• a fifth aspect of the invention is characterized in that the receiver again enters the reception enabled mode slightly earlier than the specified time.
• Fig. 1 is a view showing the frame structure in a TV data multibroadcast sound subcarrier system in accordance with the invention.
• Fig. 2 is a view showing the information bits defined in the MC in the TV data multibroadcast sound subcarrier system.
• Fig. 3 is a block diagram showing an example of a receiver for receiving a data broadcast in the TV data multibroadcast sound subcarrier system.
• Fig. 4 shows a data format for transmitting an electronic program guide in accordance with the invention.
• Fig. 5 shows schematically a television receiver for receiving and presenting the electronic program guide EPG data which are shown in Fig. 4.
• Fig. 6 shows a flowchart of operations which are carried out by a microproces- sor which is shown in Fig. 5.
• the method according to the present invention will now be explained in detail in connection with a method for controlling data reception in a receiver targeting on reception of a program whose broadcasting time (or reception enabled time) is restricted.
• reception control information data is broadcast which specifies the broadcasting time of specific programs.
• the reception control information data 21 is included in the data portion DAT, and an identifier 29 for identifying the presence of reception control information data is assigned to the MC of the data packet.
• the reception control information data 21 comprises, for example, a program number 22 (e.g., 16 bits), a service number 23 (e.g., 8 bits), a broadcasting station identification 24 (e.g., 12 bits), a broadcasting channel 25 (e.g., 10 bits), a transmission time 26 (e.g., 24 bits), and a retransmission time 27 (e.g., 16 bits) for each program.
• a program number 22 e.g., 16 bits
• a service number 23 e.g., 8 bits
• a broadcasting station identification 24 e.g., 12 bits
• a broadcasting channel 25 e.g., 10 bits
• a transmission time 26 e.g., 24 bits
• a retransmission time 27 e.g., 16 bits
• the transmission time data 26 indicates the time at which the program is broadcast and the retransmission time data 27 indicates the time at which the program whose content is the same with that of the former program is retransmitted.
• a multiplicity of retransmission times e.g., the specification of retransmission time 1, retransmission time 2, etc., is possible.
• the reception control information data for one program may be included in one data packet (DAT).
• the present invention intends to perform the reception control of the receiver based on the reception control information obtained by the above-described reception control information broadcast. This control method will now be explained in detail.
• Fig. 3 is a block diagram of an example of the receiver for receiving the data broadcast in the TV data multibroadcast sound subcarrier system.
• the receiver is provided with a tuner 2 for tuning a frequency of a sound signal in a television signal received through an antenna 1.
• an FM detecting portion 3 is connected to the tuner 2 for performing FM detection of the sound signal output.
• a filter portion 4 for obtaining data signal subcarriers 4.5fH and 7.5fH from the FM-detected signal is connected to the FM detection portion 3.
• the data signal subcarrier is subjected to QPSK modulation.
• a QPSK demodulating portion 5 for demodulating the subcarrier is connected to the filter portion 4.
• the QPSK demodulating portion 5 outputs frame data which has a frame configuration made up of a plurality of packets and is interleaved.
• a framing portion 6 for detecting the framing code FC is connected to the QPSK demodulating portion 5 to establish the frame synchronization of the frame data.
• the framing portion 6 is a coincidence circuit having a timer and a comparator, and counts a number of bits of the frame, i.e., 9232 bits upon recognizing the FC.
• the framing portion 6 is configured to detect that the next FC is input thereto based on the count.
• To the framing portion 6 is connected a deinterleave portion 7 for canceling the interleave of the data of the frame.
• a decoding portion 8 for decoding data of each packet of the frame which was subjected to the interleave cancellation is connected to the deinterleave portion 8.
• the data decoded in the decoding portion 8 is supplied to an output 9 through a non-illustrated display apparatus or the like.
• the operations of the tuner 2, the FM detecting portion 3, the filter portion 4, the QPSK demodulating portion 5, the framing portion 6, the deinterleave portion 7 and the decoding portion 8 are all controlled by a central processing unit (CPU) 10.
• CPU central processing unit
• a memory 11 and an internal clock 12 are further connected to the CPU 10.
• a ROM 13 for storing information of the program identification data (the program number data, the service number data, the broadcasting station identification data, the broadcasting channel data and others) relating to a program receivable by the receiver is also connected to the CPU 10.
• the respective elements constituting the receiver are all turned on, and the receiver enters the frame FC detection mode under control of the CPU 10.
• the framing portion 6 detects the FC of a given frame.
• the frame data is subjected to interleave cancellation in the deinterleave portion 7 and the mode control portion MC of the packet of the frame is decoded in the decoding portion 8. If the MC does not have the bit pattern which identifies the reception control information data, the decoding process is terminated and the respective elements remain in the ON state until the reception control information is received.
• the decoding portion 8 decodes the data portion DAT of the packet.
• a table of reception control information is now created in memory 11.
• the CPU 10 compares the table with program identification data information stored in the ROM 13 which identifies a program to be received.
• transmission of the program to be received is confirmed in the table and the transmission time of this program is extracted from the table, the receiver enters the standby mode until this time comes. In this manner, the operation of each element constituting the receiver is suppressed to the necessary minimum.
• each element of the receiver is turned on again under control of the CPU 10 to receive the predetermined data broadcast program.
• the time for reactivating each element is preferably slightly earlier than the stored time.
• the time at which the program is retransmitted is extracted from the retransmission time data in the associated reception control information data of the table so as to again try to receive the program.
• the operation of each element of the receiver is thus suppressed to a real minimum.
• the data broadcast reception of the receiver can be automatically controlled based on the reception control information, thereby achieving great reduction in the power consumption of the receiver.
• the reception control information data itself may be specified as a program, the program number identifying the reception control information broadcast.
• the transmission time and retransmission time(s) specify the next broadcasting time(s) of the reception control information data.
• the data broadcast may indude transmission of first reception control information identifying program categories as a first step, and second reception control information identifying a desired program among a plurality of programs in each category as a second step rather than individually identifying all the programs.
• the program number data specifies the first reception control information broadcast
• the service number specifies a category
• the transmission time specifies the transmission time of the second reception control information broadcast relating to this category.
• the service number specifies the second reception control information in a given category
• the program number identifies the program belonging to this category
• the transmission time specifies the transmission time of this program.
• the receiver Upon receiving the first reception control information broadcast, the receiver recognizes the transmission time of the second reception control information broadcast of a desired category from the service number data and the transmission time data in a desired reception control information data and enters the standby mode until the time comes.
• the second reception control information broadcast time reaches, the receiver is reactivated and confirms the transmission time of the desired program from the reception control information data obtained by the second reception control information broadcast, again entering the standby mode until this transmission time comes.
• the time of the receiver's internal clock 12 is precise, and it may be preferable that this time is calibrated by receiving a time signal broadcast when the receiver can receive a predetermined program.
• one MC pattern which is not equal to the identifier for reception control for example, "10001" or "00001" may be assigned to a time signal broadcast which includes the current time in the data portion DAT of the packet.
• the reception control information data may specify intermittent transmission data which specifies a broadcasting interval of the program rather than at a given time, for example, each hour or each day. The operation of the receiver is then controlled at intervals specified by the intermittent transmission data.
• the reception control information data may include the data relating to the personal IDs.
• the reception control information data may also include data relating to the end time of the program so that the receiver can again enter the standby mode based on the end time.
• the standby mode may continue until the associated retransmission time or until the transmission time specified by the reception control information of a desired program after again receiving this information.
• the invention is not only applicable to mobile data receivers. Reduction of power consumption is also desired in the standby state of mains-powered equipment.
• television receivers are known which are arranged to receive an electronic program guide (EPG) which is transmitted in a teletext-like manner.
• EPG electronic program guide
• the EPG is transmitted only once, or a few times at most, each day.
• the relevant processing circuitry tunneler, teletext decoder, data memory
• the relevant processing circuitry must be operative, even if the TV receiver is not used for watching a program. It is expected that international regulations will prohibit a power consumption of more than 1 Watt in the TV receiver's off-state or standby-state in the near future. This is unfeasible with present hardware circuits, particularly the TV tuner.
• the broadcaster includes in the transmission of EPG (or other types of data) the clock time at which the next transmission will take place.
• the television receiver then activates the relevant circuitry on or just before the specified time.
• the receiver switches from a real standby-state (in which the processor and the TV's real-time clock are active only) into a "datacast-standby" state in which the tuner, teletext decoder and data memory are activated for as long as the transmission takes place. Only in this "datacast-standby" state, the power consumption exceeds 1 Watt. Needless to say that all these operations are carried out without any intervention of the user.
• the broadcaster may further indicate whether the data transmission is a repetition of a previously transmitted EPG or includes new information.
• the receiver may conclude that the EPG has already been stored, and immediately switch to the normal standby state to further reduce power consumption.
• the broadcaster may indicate whether the EPG is an incremental or completely new update. An incremental update may identify to which part of a previously transmitted EPG the update relates. This allows the TV to erase that part in memory.
• Fig. 4 shows an example of a transmission format of an electronic program guide 40.
• the guide includes a header 41, a section 42 comprising a plurality of program items constituting the guide, and an end-of-file (EOF) marker 43.
• the header includes an identifier 44 (EPG) which specifies that the data 42 represents an electronic program guide, a parameter 45 (CUR) denoting the current clock time, a parameter 46 (NXT) which specifies the time at which the data will be transmitted again, and a parameter 47 (TYP) which specifies whether the EPG is merely a repetition of a previously transmitted version or a full or partial update thereof.
• the parameter 46 (NXT) may have various formats.
• Fig. 5 shows schematically a television receiver arranged to receive EPG data, and assemble the data from various channels so as to compose and display an overall TV guide covering all the channels that can be received or are desired by the user.
• the receiver comprises an antenna 50, a tuner 51, a video decoder 52, a display screen 53, a data decoder 54 (usually, a teletext decoder), a control circuit 55 in the form of a microprocessor, a remote control receiver 56, a remote control transmitter 57, an EPG data memory 58, a real-time clock circuit 59, and a power supply 60.
• the tuner receives a broadcast TV signal and demodulates it to obtain a composite video and blanking (baseband) signal CVBS.
• the CVBS signal is processed (52) and displayed (53) in a further known manner.
• the CVBS signal is also applied to the teletext decoder 54.
• the teletext decoder comprises a data slicer (not shown) to extract the digital signal which is embedded in the vertical blanking interval of the CVBS signal and applies said data to the microprocessor 55 through a communication bus 61.
• the teletext decoder 54 also comprises a display generator (not shown) which receives an image to be displayed from the microprocessor 55 through the same bus 61. The image to be displayed is fed to the display screen 53 via the video processing circuit 52 as an On-Screen-Display signal OSD.
• all the circuits of the TV receiver receive a power supply voltage in a normal operation mode.
• the microprocessor 55 and the remote control receiver 56 receiver a power supply voltage also in a regular standby mode so that the receiver can be turned on in response to a remote control command.
• the standby power is further applied to the real-time clock 59 so that the microprocessor can read the current time in the standby mode.
• the power supply 60 in Fig. 5 generates a power supply voltage Vss for the tuner 51, the teletext decoder 54, and the data memory 58, in response to a power control signal PWR from the processor 55. It is this signal which distinguishes between the regular standby mode as defined above and a "datacast standby" mode in which Vss is applied to the tuner 51, teletext decoder 54, and data memory 58.
• a step 60 the processor checks whether a remote control command is received. If that is the case, the TV is switched on (which includes applying the power supply voltage Vss to the relevant circuits) in a step 61 and operates in a further known manner.
• the processor compares the current time T provided by the real-time clock circuit 59 with the time NXT at which the EPG is to be transmitted. As long as there is a predetermined large period of time to lapse until the EPG will be transmitted (e.g. more than half an hour), the processor returns to the step 60 already described above. In this manner, the TV remains in the normal standby state unless the receiver is turned on by the user.
• a step 63 is performed in which the microprocessor activates the power signal Vss so as to apply power to the tuner, teletext decoder and data memory (or, if the receiver was in the normal operation mode, to maintain supply of power even if the user switches the TV off).
• the TV is now in the "datacast standby" state.
• the EPG data is acquired and stored in the data memory 58.
• the parameter TYP 47 in Fig. 4) is hereby interpreted so as to distinguish which part of the already stored data is updated an can be removed from the memory.
• a step 65 it is determined whether all transmitted EPG information has been processed. This is the case when the end-of-file marker EOF (43 in Fig. 4) has been encountered, or when the TYP parameter identifies that the received guide is the same as a previously transmitted and already stored version. As long as not all EPG information has been processed, the processor continuous with said processing in the step 64. Otherwise, a step 66 is performed in which the next time of transmission (specified by NXT and meanwhile stored in the data memory) is copied into the processor's register, and in which the processor refrains from further applying the power supply voltage Vss to the tuner, teletext decoder and data memory by deactivating the power control signal PWR.
• the invention relates to the reception of data by a data broadcast receiver, particularly a mobile data receiver for the Japanese TV data multibroadcast sound subcarrier system.
• the receiver is controlled to receive a desired type of data, for example, weather forecasts, news, stock prices, etc.
• the invention provides the transmission of time information which specifies for each type of data when said data will be transmitted or retransmitted. This allows the receiver to enter a standby mode in which the power consumption is reduced. On or slightly before the specified time, the receiver switches on to receive, decode and display the desired data.
• the invention is also applicable in television receivers having the facility to receive electronic program guides (EPG) or other services.
• EPG electronic program guides
• the receiver is informed about the time at which an updated version of the EPG can be expected.
• the hardware for receiving the EPG is not activated until said specified instant of time.

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• 1997
  • 1997-06-11 JP JP16952997A patent/JP3929553B2/ja not_active Expired - Lifetime
• 1998
  • 1998-06-05 EP EP98921684A patent/EP0917805B1/de not_active Expired - Lifetime
  • 1998-06-05 WO PCT/IB1998/000877 patent/WO1998057497A1/en active IP Right Grant
  • 1998-06-05 DE DE69829726T patent/DE69829726T2/de not_active Expired - Lifetime
  • 1998-12-17 US US09/230,937 patent/US6452644B1/en not_active Expired - Lifetime

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